package com.yuanxiao.coder;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToByteEncoder;

public class RpcEncoder extends MessageToByteEncoder {
    private Class<?> clazz;

    private Serializer serializer;


    public RpcEncoder(Class<?> clazz, Serializer serializer) {

        this.clazz = clazz;

        this.serializer = serializer;

    }





    @Override
    protected void encode(ChannelHandlerContext channelHandlerContext, Object msg, ByteBuf byteBuf) throws Exception {

        if(clazz !=null && clazz.isInstance(msg)){
            byte[] bytes = serializer.serialize(msg);
            byteBuf.writeInt(bytes.length);
            byteBuf.writeBytes(bytes);
        }

    }
}
